Physics
Scientific paper
Dec 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm11a2011k&link_type=abstract
American Geophysical Union, Fall Meeting 2011, abstract #SM11A-2011
Physics
[2736] Magnetospheric Physics / Magnetosphere/Ionosphere Interactions, [2740] Magnetospheric Physics / Magnetospheric Configuration And Dynamics, [2756] Magnetospheric Physics / Planetary Magnetospheres, [6275] Planetary Sciences: Solar System Objects / Saturn
Scientific paper
Using the output of a magnetohydrodynamic simulation that models nominal southern summer conditions by imposing vortical flows in the southern ionosphere (described in part 1 of this presentation), we show that the model reproduces numerous features of the magnetosphere's periodic behavior. We compare the results of the simulation with Cassini measurements that show a rotating, nearly uniform perturbation field in the equatorial plane inside of roughly 10 RS driven by a cam current system. We also show how a rotating azimuthal structure in the mass density at small radial distances and in the azimuthal current density compare with data. We find that a strong localized field-aligned current out of the southern ionosphere intensifies as it rotates through the morning sector (where it can account for observations of SKR rotation combined with localization of its most intense emissions). Additional aspects of the responses include a local-time fixed asymmetric azimuthal ring current, plasma sheet periodicities in the tail, and other observed features of the magnetosphere. The contributions of northern hemisphere perturbations at a different period during southern summer is examined. We argue that the magnetosphere is remotely sensing structure that appears to be present in the high latitude ionosphere.
Galland Kivelson Margaret
Gombosi Tamas I.
Jia Xun
No associations
LandOfFree
An Atmospheric Vortex as the Driver of Saturn's Electromagnetic Periodicities. 2. Responses in Magnetosphere and Ionosphere does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with An Atmospheric Vortex as the Driver of Saturn's Electromagnetic Periodicities. 2. Responses in Magnetosphere and Ionosphere, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An Atmospheric Vortex as the Driver of Saturn's Electromagnetic Periodicities. 2. Responses in Magnetosphere and Ionosphere will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1889086